Indian stock markets plunged on June 21st due to indications from US Federal Reserve Chairman Bernanke that the central bank may start tapering its stimulus measures. The Sensex fell 526 points (-2.74%) and the Nifty closed below its support level of 5700 at 5655 points (-2.86%). Various scrips such as IDFC, Sesa Goa, SAIL, and STER were mentioned as being at support levels with potential targets if bounced back from support. Open interest in Nifty futures rose 16.19% from the previous day, as markets reacted nervously to Bernanke's comments on tapering QE stimulus.